A: 观察水的沸腾
B: 空气推动塞子时,内能减少
C: 空气被压缩时内能增大
D: 内燃机压缩冲程
____ ____ the workers are working!
要求:不少于30词。
Meals
Food
breakfast
milk, eggs and an apple
lunch
fish, noodles and vegetables
dinner
bread, juice and chicken